Jobs in Creteil, France

We’re looking for an AI & data engineer, engineer at heart, with entrepreneurial DNA and early stage 0→1 experience. It’s a plus if you are passionate about digital health and longevity.

You’ll shape our functional AI agents that could add healthy years to millions of lives:

• Own our AI agents doctor built on top of large language model, our vectorized infrastructure and thousand of users data.
• Collaborate with our medical team to translate complex clinical requirements into agents, and workflows. Deliver them the tools they need to
• Work with our third-party data providers and partners (labs, wearables, etc) to integrate the data and manage.
• Solve real-world health data, privacy, and UX puzzles at European scale.

We are building fast, for the long term.

1. Rigor without ego: audits, science, and code deserve the same high bar.
2. Default to action: small PRs, short feedback loops.
3. Radical ownership: you break it, you fix it (and write the doc).
4. Play long games: we’re building a 100-year company to help people live 100 healthy years.

• Equity that matters: real ownership at the inflection point. With top-tier salaries.
• Budget for personal care, personal development, and health stipends (we pay your own Lucis tests).
• Quarterly in-person retreats in Europe. We repeat the YC experience every 3 months.
• Hardware of your choice, modern dev-tool stack.
• The chance to directly improve thousands of lives, starting with your own, through smarter preventive care. We are the average of the person we spend our time with.

Core responsibilities

• Build the new version of our Doctor AI: an LLM-powered reasoning engine that drafts safe, evidence-based protocols a physician can sign off in minutes. You’ll be the technical owner who turns that vision into production reality.
• Work with our medical team to translate complex medical requirements into actionable insights for our users. Pair with our physicians to encode deterministic logic & decision trees.
• Architect the knowledge graph (PubMed, Examine, internal studies) and vector search layer (PGVector / Pinecone).
• Design chain-of-thought prompts that reason & cite. Productionize LLM endpoints on GCP (Vertex AI, Cloud Run, GPUs).
• Maintain strict compliance with HDS and GDPR regulations through robust security measures.
• Drive engineering rituals. Drive continuous improvement through Agile development practices and cross-team collaboration.

• Have 5 + yrs building and shipping ML or LLM systems in production.
• Fluency with Python, LangChain/LlamaIndex or equivalent.
• Hands-on with vector databases, retrieval pipelines, and embeddings.
• Solid grasp of data privacy & medical compliance (GDPR, ISO 13485, HIPAA, or MDR).
• Entrepreneurial, low-ego mindset. You want to build a massive company with massive impact.
• Cautious about your health, actively doing sport. Care about health: you read PubMed abstracts for fun, or track your own biomarkers and metrics.
• Fluent in English. French is a bonus.
• You have led a team before. You remain hands-on more than 80% of your time in your current job.